Plug



FIG. 1 is a perspective view of the plug;

FIG. 2 is a front elevation view of the plug;

FIG. 3 is a rear elevation view of the plug;

FIG. 4 is a right side elevation view of the plug;

FIG. 5 is a left side elevation view of the plug;

FIG. 6 is a top plan view of the plug; and,

FIG. 7 is a bottom plan view of the plug.

Broken lines appearing in the drawings are intended to be for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a plug, as shown and described. 